%0 Journal Article
%A L. S. Pontryagin
%A E. F. Mishchenko
%T Some problems in the theory of differential equations with a~small parameter
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1985
%P 99-118
%V 169
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TM_1985_169_a6/
%G ru
%F TM_1985_169_a6